<template>
  <div class="list" ref="wrapper">
    <div class="center">
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{ this.city }}</div>
          </div>
        </div>
      </div>

      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div
            class="button-wrapper"
            v-for="item in hot"
            :key="item.id"
            @click="handleCityClick(item.name)"
          >
            <div class="button">{{ item.name }}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item, key) in cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{ key }}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for="innterItem in item"
            :key="innterItem.id"
            @click="handleCityClick(innterItem.name)"
          >
            {{ innterItem.name }}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from "better-scroll";
import { mapState, mapMutations } from "vuex";
export default {
  props: {
    cities: Object,
    hot: Array,
    letter: String
  },
  computed: {
    ...mapState(["city"])
  },
  mounted() {
    const options = {
      click: true,
      tap: true
    };
    this.scroll = new Bscroll(this.$refs.wrapper, options);
  },
  watch: {
    letter() {
      // "better-scroll" 提供了以下方法
      if (this.letter) {
        const element = this.$refs[this.letter][0];
        this.scroll.scrollToElement(element);
      }
    }
  },
  methods: {
    handleCityClick(city) {
      // this.$store.commit("changeCity", city);
      this.changeCity(city);
      this.$router.push("/");
    },
    ...mapMutations(["changeCity"])
  }
};
</script>

<style lang="stylus" scoped>
@import '~@/assets/styles/varibles.styl'

.border-topbottom {
  &:before {
    border-color: #ccc
  }
  &:after {
    border-color: #ccc
  }
}
.border-bottom {
  &:before {
    border-color: #ccc
  }
}
.list {
  position: absolute
  top: 1.58rem
  left: 0
  right: 0
  bottom: 0
  overflow: hidden
}
.title {
  line-height: 0.54rem
  background-color: #eee
  padding-left: 0.2rem
  color: #666
  font-size: 0.26rem
}
.button-list {
  padding: 0.1rem 0.6rem 0.1rem 0.1rem
  overflow: hidden
  .button-wrapper {
    float: left
    width: 33.33%
    .button {
      text-align: center
      margin: 0.1rem
      border: 0.02rem solid #ccc
      padding: 0.1rem 0
      border-radius: 0.06rem
    }
  }
}
.item-list {
  .item {
    line-height: 0.76rem
    color: #666
    padding-left: 0.2rem
  }
}
</style>
